Free deliveryWhy The Wellness recommends this
Curated, not stocked.
Our doctors use HRV monitoring as a practical window into nervous system recovery — something that subjective self-report consistently misses. WHOOP's methodology is grounded in autonomic physiology, and the longitudinal trending it provides is more clinically meaningful than single-point readings. It earned its place here because it gives patients and athletes a consistent, low-friction way to connect daily behaviours — sleep, alcohol, stress, training load — to measurable physiological outcomes.
About this product
WHOOP 4.0
The WHOOP 4.0 is a continuous wearable monitor designed for people who want precise data on recovery, sleep, and physiological strain. Worn on the wrist, it tracks heart rate variability, resting heart rate, respiratory rate, skin temperature, and blood oxygen saturation around the clock — not just during workouts. From that data it calculates three daily scores: a Recovery score, a Strain score, and a Sleep score. The Recovery score in particular draws on HRV trends over time to tell you how ready your body is to handle load on a given day.
It suits anyone training consistently and wanting to move beyond perceived effort — athletes managing training blocks, professionals monitoring the effect of stress and sleep debt, or anyone recovering from illness or overtraining. The screenless design means it sits quietly on the wrist without demanding attention; you check the data in the companion app when it suits you.
WHOOP is one of the more studied wearable platforms in sport science, and its HRV-based recovery methodology is grounded in a well-established body of research on autonomic nervous system monitoring. The 4.0 generation improved sensor accuracy and introduced a water-resistant form factor. It is a tool for people who want to act on data, not just collect it.
What it does
Benefits
- 01
Continuous HRV tracking to guide daily training readiness
- 02
Sleep staging with actionable sleep debt and quality scores
- 03
Physiological strain scoring calibrated to your own baseline
- 04
Resting heart rate and respiratory rate monitored overnight
- 05
Screenless design minimises disruption to sleep and focus
Get the most from it
How to use
Wear the WHOOP 4.0 continuously on the wrist, including during sleep, to allow the sensor to build an accurate personal baseline. Check the companion app each morning to review your Recovery and Sleep scores before planning the day's training or activity. Follow the in-app guidance for optimal sensor positioning and charging cadence.
What's inside
Ingredients
View full ingredient list
Fitness-focused wearable with recovery insights
Common questions
Frequently asked
Do I need a subscription to use the WHOOP 4.0?
WHOOP operates on a membership model — the hardware and app access are bundled together. Check the current terms on the WHOOP website or your purchase confirmation for what is included and for how long.
How is WHOOP different from a standard fitness tracker or smartwatch?
Most smartwatches sample heart rate intermittently and prioritise notifications. WHOOP samples continuously, has no screen, and is built specifically around recovery and strain analytics. Its HRV-based Recovery score is designed to inform training decisions rather than simply log activity.
How long does it take to get meaningful data?
WHOOP typically requires around 30 days to establish a reliable personal baseline for HRV and resting heart rate. Early readings are directionally useful, but the scoring becomes more individually calibrated over time.
Who is this best suited to?
It suits consistent exercisers, competitive athletes, and anyone systematically trying to improve sleep or manage training load. Casual users who exercise sporadically may find the depth of data less actionable.
Can it be worn in water?
The WHOOP 4.0 is water-resistant and designed to be worn during swimming and showering. Check the official specification for depth and duration ratings before use in open water or high-pressure environments.
Doctor-guided care
Performance has a baseline.
Body composition, hormones, VO₂ max — we measure them all. Train against the picture, not against guesswork.
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